Abstract
Two field experiments were conducted at El-Bostan area at Aly Mubark experimental farm south Tahrir region, El Behira Governorate (300 54 N, 290 52 E, and 25 m above sea level), during 2012/2013 and 2013/2014 to study the effect of humic application with/without foliar application of different potassium source (potassium nitrate, potassium silicates, potassium humate, potassium sulphate) on sweet potato yield and quality characteristics under drip irrigation system. The results indicated that humic acid applications significantly increased the total tuber yield and all measured growth parameters of sweet potato. The relative increases of total tuber yield, marketable tuber yield, average tuber weight, tuber dry weight, foliage dry weight and leaf area were 6.64, 5.24, 7.47, 19.07, 4.35 and 7.92 %, respectively. Humic acid applications significantly increased total nitrogen, potassium and phosphorous content of sweet potato tubers. Also, foliar application of different potassium sources significantly increased total tuber yield of sweet potato and the most of quality characteristics. Potassium nitrate (KN) and potassium silicates treatments have the highest ability to increase the yield and other growth parameter than other potassium sources (potassium humate and potassium sulphate) under sandy soil condition. Interaction effects between humic acid and foliar application of different potassium sources indicated that there was a significant effect between soil application (fertigation) of humic acid and the foliar application of different potassium sources except for tuber potassium and phosphorus content and also, for available nitrogen, potassium and phosphorous in soil at harvest stage. Calculated water use efficiency (WUE) for total tuber yield increased with increasing rates of soil application of humic acid for the two growing season (2012/2013-2013/2014). Relative increases in WUE for total tuber yield were 4.46 and 11.65 % for HA2 and HA4, respectively as a mean value of the tow growing seasons. Also, WUE for marketable yield were more affected by soil application of humic acid compared to WUE for total yield, where the relative increases were 6.07 and 14.51 % for HA2 and HA4, respectively as a mean value of the tow growing seasons. Potassium silicate have the highest WUE for total tuber root yield values 3.76 ton/m3 followed by potassium nitrate 3.61 ton/m3 while potassium sulphate have the lowest WUE for total tuber root yield 3.20 ton/m3 as a mean values of the two growing season. It can be concluded that humic acid at rate of 4 kg/feddan with potassium silicate as a foliar application was good practice to increase sweet potato production under sandy soil condition.
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Claims 19
Claim · model-written summary
Humic acid increased sweet potato total tuber yield by 6.64.
- Taxon
- Sweet Potato
_Flower.jpg?width=60)
Ipomoea batatast0 - Treatment
- Humic Acidt0
- Outcome
- total tuber yielde0
- Direction
- increasese0
- Value
- 6.64e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
e0“The relative increases of total tuber yield, marketable tuber yield, average tuber weight, tuber dry weight, foliage dry weight and leaf area were 6.64, 5.24, 7.47, 19.07, 4.35 and 7.92 %, respectively.”
t0“Effect of Humic Acid and Foliar Application of Different Potassium Sources on Yield, Quality and Water Use Efficiency of Sweet Potato Grown under Drip Irrigation in Sandy Soil”
Claim · model-written summary
Humic acid increased sweet potato marketable tuber yield by 5.24.
- Taxon
- Sweet PotatoIpomoea batatast0
- Treatment
- Humic Acidt0
- Outcome
- marketable tuber yielde0
- Direction
- increasese0
- Value
- 5.24e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The relative increases of total tuber yield, marketable tuber yield, average tuber weight, tuber dry weight, foliage dry weight and leaf area were 6.64, 5.24, 7.47, 19.07, 4.35 and 7.92 %, respectively.”
t0“Effect of Humic Acid and Foliar Application of Different Potassium Sources on Yield, Quality and Water Use Efficiency of Sweet Potato Grown under Drip Irrigation in Sandy Soil”
Claim · model-written summary
Humic acid increased sweet potato average tuber weight by 7.47.
- Taxon
- Sweet PotatoIpomoea batatast0
- Treatment
- Humic Acidt0
- Outcome
- average tuber weighte0
- Direction
- increasese0
- Value
- 7.47e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The relative increases of total tuber yield, marketable tuber yield, average tuber weight, tuber dry weight, foliage dry weight and leaf area were 6.64, 5.24, 7.47, 19.07, 4.35 and 7.92 %, respectively.”
t0“Effect of Humic Acid and Foliar Application of Different Potassium Sources on Yield, Quality and Water Use Efficiency of Sweet Potato Grown under Drip Irrigation in Sandy Soil”
Claim · model-written summary
Humic acid increased sweet potato tuber dry weight by 19.07.
- Taxon
- Sweet PotatoIpomoea batatast0
- Treatment
- Humic Acidt0
- Outcome
- tuber dry weighte0
- Direction
- increasese0
- Value
- 19.07e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The relative increases of total tuber yield, marketable tuber yield, average tuber weight, tuber dry weight, foliage dry weight and leaf area were 6.64, 5.24, 7.47, 19.07, 4.35 and 7.92 %, respectively.”
t0“Effect of Humic Acid and Foliar Application of Different Potassium Sources on Yield, Quality and Water Use Efficiency of Sweet Potato Grown under Drip Irrigation in Sandy Soil”
Claim · model-written summary
Humic acid increased sweet potato foliage dry weight by 4.35.
- Taxon
- Sweet PotatoIpomoea batatast0
- Treatment
- Humic Acidt0
- Outcome
- foliage dry weighte0
- Direction
- increasese0
- Value
- 4.35e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The relative increases of total tuber yield, marketable tuber yield, average tuber weight, tuber dry weight, foliage dry weight and leaf area were 6.64, 5.24, 7.47, 19.07, 4.35 and 7.92 %, respectively.”
t0“Effect of Humic Acid and Foliar Application of Different Potassium Sources on Yield, Quality and Water Use Efficiency of Sweet Potato Grown under Drip Irrigation in Sandy Soil”
Claim · model-written summary
Humic acid increased sweet potato leaf area by 7.92 %.
- Taxon
- Sweet PotatoIpomoea batatast0
- Treatment
- Humic Acidt0
- Outcome
- leaf areae0
- Direction
- increasese0
- Value
- 7.92 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The relative increases of total tuber yield, marketable tuber yield, average tuber weight, tuber dry weight, foliage dry weight and leaf area were 6.64, 5.24, 7.47, 19.07, 4.35 and 7.92 %, respectively.”
t0“Effect of Humic Acid and Foliar Application of Different Potassium Sources on Yield, Quality and Water Use Efficiency of Sweet Potato Grown under Drip Irrigation in Sandy Soil”
Claim · model-written summary
Humic acid increased tuber nitrogen, potassium and phosphorous content.
- Taxon
- sweet potatoIpomoea batatase0
- Organ / stage
- tuberse0
- Treatment
- Humic acid applicationse0
- Outcome
- total nitrogen, potassium and phosphorous contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Humic acid applications significantly increased total nitrogen, potassium and phosphorous content of sweet potato tubers.”
Claim · model-written summary
Foliar potassium sources increased sweet potato total tuber yield and most quality characteristics.
- Taxon
- sweet potatoIpomoea batatase0
- Treatment
- foliar application of different potassium sourcese0
- Outcome
- total tuber yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Also, foliar application of different potassium sources significantly increased total tuber yield of sweet potato and the most of quality characteristics.”
Claim · model-written summary
Potassium nitrate increased yield and growth more than potassium humate and potassium sulphate.
- Taxon
- Sweet PotatoIpomoea batatast0
- Treatment
- Potassium nitratee0
- Outcome
- yield and other growth parametere0
- Direction
- higheste0
- Comparator
- potassium humate and potassium sulphatee0
- Setting
- sandy soil conditione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potassium nitrate (KN) and potassium silicates treatments have the highest ability to increase the yield and other growth parameter than other potassium sources (potassium humate and potassium sulphate) under sandy soil condition.”
t0“Sweet Potato Grown under Drip Irrigation in Sandy Soil”
Claim · model-written summary
potassium silicates increased yield and growth more than potassium humate and potassium sulphate.
- Taxon
- Sweet PotatoIpomoea batatast0
- Treatment
- potassium silicatese0
- Outcome
- yield and other growth parametere0
- Direction
- higheste0
- Comparator
- potassium humate and potassium sulphatee0
- Setting
- sandy soil conditione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potassium nitrate (KN) and potassium silicates treatments have the highest ability to increase the yield and other growth parameter than other potassium sources (potassium humate and potassium sulphate) under sandy soil condition.”
t0“Sweet Potato Grown under Drip Irrigation in Sandy Soil”
Claim · model-written summary
The humic acid and foliar potassium interaction had significant effects on measured outcomes except stated tuber nutrients and soil nutrients.
- Taxon
- Sweet PotatoIpomoea batatast0
- Treatment
- soil application (fertigation) of humic acid and the foliar application of different potassium sourcese0
- Outcome
- significant effecte0
- Qualifier
- except for tuber potassium and phosphorus content and also, for available nitrogen, potassium and phosphorous in soil at harvest stagee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Interaction effects between humic acid and foliar application of different potassium sources indicated that there was a significant effect between soil application (fertigation) of humic acid and the foliar application of different potassium sources except for tuber potassium and phosphorus content and also, for available nitrogen, potassium and phosphorous in soil at harvest stage.”
t0“Sweet Potato Grown under Drip Irrigation in Sandy Soil”
Claim · model-written summary
HA2 increased WUE for total tuber yield by 4.46.
- Taxon
- Sweet PotatoIpomoea batatast0
- Treatment
- HA2e0
- Outcome
- WUE for total tuber yielde0
- Direction
- increasese0
- Value
- 4.46e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative increases in WUE for total tuber yield were 4.46 and 11.65 % for HA2 and HA4, respectively as a mean value of the tow growing seasons.”
t0“Sweet Potato Grown under Drip Irrigation in Sandy Soil”
Claim · model-written summary
HA4 increased WUE for total tuber yield by 11.65 %.
- Taxon
- Sweet PotatoIpomoea batatast0
- Treatment
- HA4e0
- Outcome
- WUE for total tuber yielde0
- Direction
- increasese0
- Value
- 11.65 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative increases in WUE for total tuber yield were 4.46 and 11.65 % for HA2 and HA4, respectively as a mean value of the tow growing seasons.”
t0“Sweet Potato Grown under Drip Irrigation in Sandy Soil”
Claim · model-written summary
HA2 increased WUE for marketable yield by 6.07.
- Taxon
- Sweet PotatoIpomoea batatast0
- Treatment
- HA2e0
- Outcome
- WUE for marketable yielde0
- Direction
- increasese0
- Value
- 6.07e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Also, WUE for marketable yield were more affected by soil application of humic acid compared to WUE for total yield, where the relative increases were 6.07 and 14.51 % for HA2 and HA4, respectively as a mean value of the tow growing seasons.”
t0“Sweet Potato Grown under Drip Irrigation in Sandy Soil”
Claim · model-written summary
HA4 increased WUE for marketable yield by 14.51 %.
- Taxon
- Sweet PotatoIpomoea batatast0
- Treatment
- HA4e0
- Outcome
- WUE for marketable yielde0
- Direction
- increasese0
- Value
- 14.51 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Also, WUE for marketable yield were more affected by soil application of humic acid compared to WUE for total yield, where the relative increases were 6.07 and 14.51 % for HA2 and HA4, respectively as a mean value of the tow growing seasons.”
t0“Sweet Potato Grown under Drip Irrigation in Sandy Soil”
Claim · model-written summary
Potassium silicate produced WUE for total tuber root yield of 3.76 ton/m3.
- Taxon
- Sweet PotatoIpomoea batatast0
- Treatment
- Potassium silicatee0
- Outcome
- WUE for total tuber root yielde0
- Direction
- higheste0
- Value
- 3.76 ton/m3e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potassium silicate have the highest WUE for total tuber root yield values 3.76 ton/m3 followed by potassium nitrate 3.61 ton/m3 while potassium sulphate have the lowest WUE for total tuber root yield 3.20 ton/m3 as a mean values of the two growing season.”
t0“Sweet Potato Grown under Drip Irrigation in Sandy Soil”
Claim · model-written summary
potassium nitrate produced WUE for total tuber root yield of 3.61 ton/m3.
- Taxon
- Sweet PotatoIpomoea batatast0
- Treatment
- potassium nitratee0
- Outcome
- WUE for total tuber root yielde0
- Direction
- followed bye0
- Value
- 3.61 ton/m3e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potassium silicate have the highest WUE for total tuber root yield values 3.76 ton/m3 followed by potassium nitrate 3.61 ton/m3 while potassium sulphate have the lowest WUE for total tuber root yield 3.20 ton/m3 as a mean values of the two growing season.”
t0“Sweet Potato Grown under Drip Irrigation in Sandy Soil”
Claim · model-written summary
potassium sulphate produced WUE for total tuber root yield of 3.20 ton/m3.
- Taxon
- Sweet PotatoIpomoea batatast0
- Treatment
- potassium sulphatee0
- Outcome
- WUE for total tuber root yielde0
- Direction
- loweste0
- Value
- 3.20 ton/m3e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potassium silicate have the highest WUE for total tuber root yield values 3.76 ton/m3 followed by potassium nitrate 3.61 ton/m3 while potassium sulphate have the lowest WUE for total tuber root yield 3.20 ton/m3 as a mean values of the two growing season.”
t0“Sweet Potato Grown under Drip Irrigation in Sandy Soil”
Claim · model-written summary
The authors recommend humic acid at 4 kg/feddan with foliar potassium silicate to increase sweet potato production on sandy soil.
- Taxon
- sweet potatoIpomoea batatase0
- Treatment
- humic acid at rate of 4 kg/feddan with potassium silicate as a foliar applicatione0
- Outcome
- good practice to increase sweet potato productione0
- Setting
- sandy soil conditione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It can be concluded that humic acid at rate of 4 kg/feddan with potassium silicate as a foliar application was good practice to increase sweet potato production under sandy soil condition.”
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